Question 8 0 0.5 points When a distribution is negatively skewed, a) the tails are fatter than in a normal distribution. b) the skew measure is positive. c) standard deviation correctly estimates risk. d) standard deviation overestimates risk e) standard deviation underestimates risk. Question 10 0 0.5 points The arithmetic and geometric average of-11%, 15%, and 20% are and a) 8% and 11.22% b) 8% and 8% c) 9.67% and 7.09% d) 8% and 7.09% e) 6.45% and 7.09%